PoojaMoolya at 06:36, 10 March 2017

2017-03-10T06:36:42Z

Sandhya.np14 at 17:10, 18 November 2015

2015-11-18T17:10:06Z

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Sandhya.np14 at 17:26, 28 October 2015

2015-10-28T17:26:32Z

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Priyacst at 10:06, 13 November 2014

2014-11-13T10:06:52Z

Pratik kamble at 09:39, 10 July 2014

2014-07-10T09:39:19Z

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PoojaMoolya at 10:42, 2 June 2014

2014-06-02T10:42:01Z

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Sneha at 10:16, 16 April 2013

2013-04-16T10:16:50Z

Sneha: Created page with ' {| border=1 || ''Time''' || '''Narration''' |- | 00.01 | Welcome to the Spoken Tutorial on '''Ruby Methods'''. |- | 00.05 | In this tutorial we will learn |- | 00.07 | W…'

2013-04-16T10:15:54Z

Created page with ' {| border=1 || ''Time''' || '''Narration''' |- | 00.01 | Welcome to the Spoken Tutorial on '''Ruby Methods'''. |- | 00.05 | In this tutorial we will learn |- | 00.07 | W…'

New page

{| border=1
|| ''Time'''
|| '''Narration'''

|-
| 00.01
| Welcome to the Spoken Tutorial on '''Ruby Methods'''.

|-
| 00.05
| In this tutorial we will learn

|-
| 00.07
| What is a '''method''' ?
|-
| 00.09
| Syntax for '''method''' and
|-
| 00.11
| We will Some examples

|-
| 00.13
| Here we are using ''Ubuntu Linux '''version 12.04 '''Ruby''' 1.9.3

|-
| 00.21
| To follow this tutorial you must have knowledge of using '''Terminal '''and '''Text editor '''in '''Linux'''.

|-
| 00.28
| Let us now start with an introduction to '''methods.'''

|-
| 00.31
|A '''Method''' is a self-contained program executing a specific task.

|-
| 00.37
|'''Ruby method''' is very similar to functions in any other programming language.

|-
| 00.42
| | '''Method''' name should begin with a lowercase letter.

|-
| 00.46
|'''Methods''' should be defined before calling them.

|-
| 00.50
| Let us see the syntax for '''Method'''

|-
| 00.52
|'''Methods '''are defined using the keyword '''def''' followed by the '''method''' name.

|-
| 00.57
|The '''arguments''' specify values that are passed to the '''method''', to be processed.

|-
| 01.03
|The '''ruby code''' section represents the body of the '''method''' that performs the processing.'' ''

|-
| 01.10
|The '''method''' body is enclosed by this definition on the top and the word '''end''' on the bottom

|-
| 01.16
|This is called as method with arguments.

|-
| 01.20
| Another syntax for method is

|-
| 01.23
|The keyword '''def '''followed by the '''method name''' and an empty argument list

|-
| 01.29
|The '''ruby code''' section that represents the body of the '''method''' .'' ''

|-
| 01.32
|And the word end that marks end of method

|-
| 01.36
|This is called as method without arguments.

|-
| 01.40
| Let's see how to use a method.

|-
| 01.43
|I have already typed a program in the '''gedit''' editor.

|-
| 01.47
|Let me open it.

|-
| 01.48
| Please note that our filename is '''method-without-argument.rb'''

|-
| 01.55
|I have saved the file inside the '''rubyprogram''' folder.

|-
| 01.59
| In this program we will calculate the sum of two numbers using '''method'''.

|-
| 02.04
| | Let us go through the program.

|-
| 02.06
| Here we have declared a global variable '''a.'''

|-
| 02.09
|And we have initialized it by assigning value of '''5'''.

|-
| 02.13
|Global variable names are prefixed with a''' dollar sign ($)'''.''' '''

|-
| 02.17
| Global variables are accessible from anywhere in the '''Ruby''' program; regardless of where they are declared.

|-
| 02.25
| Here we have declared a method called '''add''' without any arguments.

|-
| 02.31
| Here we ask the user to enter the second number.

|-
| 02.36
| User will enter the value.

|-
| 02.38
| '''gets method''' gets the input from the console but in a '''string '''format.

|-
| 02.44
| So we need to convert it into '''integer''', using '''to_i '''method.

|-
| 02.50
| The converted value is then stored in the variable '''b .''' '''b '''is a local variable.

|-
| 02.57
|It is available only to the '''method''' inside which it is declared.

|-
| 03.02
| Here we add the values of global variable '''a '''and variable '''b.'''

|-
| 03.07
|The result is then stored in variable '''sum.'''

|-
| 03.11
| Then we print the '''sum.'''

|-
| 03.13
| This shows a way of inserting a variable within a string.

|-
| 03.18
|Here the content of '''sum''' is returned as a '''string''' and is substituted into the outer '''string'''.

|-
| 03.26
| '''end''' marks end of the method.

|-
| 03.29
| There are two types of methods.

|-
| 03.32
|'''User-defined method''' - that is our '''add''' method.

|-
| 03.35
|'''Pre-defined method '''- that is '''print''', '''gets''' and '''to_i''' method.

|-
| 03.42
| Here we call our''add '''method.

|-
| 03.46
|The addition operation will be performed and the result will be printed.

|-
| 03.50
| Now let us click on the '''Save. '''

|-
| 03.53
|This program will be saved in''' rubyprogram''' folder as mentioned earlier.

|-
| 03.59
|Now let us execute the program.

|-
| 04.02
| Open the terminal by pressing the '''Ctrl, Alt and T '''keys simultaneously.

|-
| 04.08
|A terminal window appears on your screen.

|-
| 04.11
| To execute the program, we need to go to the subdirectory '''rubyprogram'''.

|-
| 04.17
| So let's type '''cd'' '''''space'' '''''Desktop/rubyprogram'' '''''and press'' '''''Enter.'''

|-
| 04.26
| Now Type '''ruby '''space '''method-without-argument.rb''' and press '''Enter'''

|-
| 04.41
| '''Enter the second number '''is displayed.

|-
| 04.44
|I will enter value as '''4.''' type 4 and press enter

|-
| 04.48
| We get the output as - '''Sum of two numbers 5 and 4 is 9'''

|-
| 04.53
| Now let us see an example of '''method''' with arguments.

|-
| 04.58
|I have already typed this program in the '''gedit''' editor, let me open it.

|-
| 05.04
| Please note that our filename is '''method-with-argument.rb'''

|-
| 05.10
|I have saved this file also inside the '''rubyprogram''' folder.

|-
| 05.16
| Let us go through the program.

|-
| 05.18
| Here we have declared a '''method''' called '''add.''' '''a,b''' are the arguments of the '''method add. '''

|-
| 05.26
| Here the values of '''a''' and '''b''' are added.

|-
| 05.29
|And the sum is returned to the '''method '''call.

|-
| 05.32
| '''end''' marks the end of method.

|-
| 05.36
| Here we are asking the user for input.

|-
| 05.40
|User will enter the values of a and b.

|-
| 05.42
|The values will be stored in variable '''a''' and variable '''b, '''respectively.

|-
| 05.47
| Here we call the '''add''' '''method'''

|-
| 05.49
|Then we pass the arguments as '''a''' and '''b.'''

|-
| 05.53
| The value returned by the '''method add''' ,''' '''after performing the addition operation will be stored in '''c.'''

|-
| 06.00
| Here we print the sum which is store in '''c'''.

|-
| 06.04
| Lets execute this code. Go to the terminal.

|-
| 06.08
|Let us first clear the terminal Type''' clear''' and press enter

|-
| 06.14
| | We are already in the subdirectory '''rubyprogram.'''

|-
| 06.17
| Now, press the up arrow key twice to get the previous command.

|-
| 06.22
|Replace '''method-without-arguments.rb''' with '''method-with-arguments.rb '''

|-
| 06.33
| And Press''' Enter'''

|-
| 06.35
| '''Enter the values of a and b '''is displayed.

|-
| 06.39
|I will enter''' 8 '''and''' 9.'''

|-
| 06.41
|Type 8 and press Enter

|-
| 06.43
|Type 9 and press Enter

|-
| 06.46
| We get the output as

|-
| 06.47
|'''Sum of two numbers 8 and 9 is 17.'''

|-
| 06.52
|Now I will show you one important feature of '''Ruby''' '''method.'''

|-
| 06.57
| Let's go back to the program in the text editor.

|-
|07.00
|Delete the keyword '''return.'''

|-
| 07.03
|Now click on '''Save''' button.

|-
| 07.05
| Let's execute the code.Go to the terminal.

|-
|07.09
| Press the up arrow key to get the previous command and Press''' Enter.'''

|-
| 07.15
|''Enter the values of a and b '''is displayed.

|-
| 07 .18
|I will enter''' 10 '''and''' 15.'''

|-
| 07.22
|Type 10 and press Enter Type 15 and press Enter

|-
| 07.28
| We get the output as

|-
| 07.29
|'''Sum of two numbers10 and 15 is 25. '''

|-
| 07.33
| We can see that the program is executed without any error, even after deleting the keyword '''return.'''

|-
| 07.40
| This is because '''Ruby '''automatically returns the value calculated in the '''method.'''

|-
| 07.46
|The keyword '''return''' in '''method''' is optional in '''Ruby.'''

|-
| 07.50
| This brings us to the end of this Spoken Tutorial.

|-
| 07.53
| Let us switch back to slides

|-
| 07.56
|Let's summarize

|-
| 07.58
|In this tutorial we have learnt

|-
| 08.00
|About '''Methods'''
|-
| 08.01
| Syntax for '''Method''' without arguments
|-
| 08.04
|And '''Method''' with arguments
|-
| 08.06
| Returning value from '''method'''

|-
| 08.09
| As an assignment

|-
| 08.10
|Write a program,to calculate area of a square

|-
| 08.13
| by using '''method '''and
|-
| 08.15
| by getting the input from user

|-
| 08.17
| Watch the video available at the following link.

|-
| 08.20
|It summarises the Spoken Tutorial project.

|-
| 08.24
|If you do not have good bandwidth, you can download and watch it.

|-
| 08.29
| The Spoken Tutorial Project Team :

|-
| 08.31
|Conducts workshops using spoken tutorials

|-
| 08.33
|Gives certificates to those who pass an online test

|-
| 08.36
|For more details, please write to

[mailto:contact@spoken-tutorial.org contact@spoken-tutorial.org]

|-
| 08.45
| Spoken Tutorial Project is a part of the Talk to a Teacher project.

|-
| 08.49
|It is supported by the National Mission on Education through ICT, MHRD, Government of India.

|-
| 08.55
|More information on this Mission is available at: spoken-tutorial.org/NMEICT-Intro.

|-
| 09.00
|This is Afrin Pinjari from IIT Bombay, signing off.

|-
| 09.05
|Thank you for watching.

|}

@@ Line 15: / Line 15: @@
 |-
 | 00:07
-|* What is a '''method''' ?
+| What is a '''method''' ?
 |-
 | 00:09
-|* Syntax for '''method''' and
+| Syntax for '''method''' and
 |-
@@ Line 27: / Line 27: @@
 |-
 |  00:13
-|  Here, we are using:
+|  Here, we are using: '''Ubuntu Linux '''version '''12.04''',  '''Ruby 1.9.3'''
-* '''Ubuntu Linux '''version '''12.04'''
-* '''Ruby 1.9.3'''
 |-
@@ Line 192: / Line 190: @@
 |-
-|   03:25
+| 03:25
-|   '''end''' marks the end of the '''method'''.
+| '''end''' marks the end of the '''method'''.
 |-
 | 03:28
-|   There are two types of methods.
+|There are two types of methods.
 |-
@@ Line 365: / Line 363: @@
 |-
 |  06:46
-| We get the output as
+| We get the output as ''''"Sum of two numbers 8 and 9 is 17".'''
-−
-|-
-| 06:47
-|'''"Sum of two numbers 8 and 9 is 17".'''
 |-
@@ Line 445: / Line 439: @@
 |-
 | 07:59
-|* About '''methods'''
+| About '''methods'''
 |-
 | 08:01
-|* Syntax  for '''method''' without arguments
+| Syntax  for '''method''' without arguments
 |-
 | 08:04
-|* And '''method''' with arguments
+| And '''method''' with arguments
 |-
 | 08:06
-|* Returning value from a '''method'''.
+| Returning value from a '''method'''.
 |-
@@ Line 469: / Line 463: @@
 |-
 | 08:13
-| by using '''method '''and
+| by using '''method '''and  by getting the input from the user.
-−
-|-
-| 08:14
-| by getting the input from the user.
 |-
@@ Line 493: / Line 483: @@
 |-
 | 08:30
-|* Conducts workshops using spoken tutorials.
+| Conducts workshops using spoken tutorials.
 |-
 | 08:33
-|* Gives certificates to those who pass an online test.
+| Gives certificates to those who pass an online test.
 |-
 | 08:36
-|For more details, please write to:
+|For more details, please write to: contact@spoken-tutorial.org
 contact@spoken-tutorial.org
 |-

@@ Line 23: / Line 23: @@
 |-
 | 00:11
-| We will Some examples
+| We will see Some examples
 |-

@@ Line 405: / Line 405: @@
 |-
-| 07 .18
+| 07.18
 |I will enter''' 10 '''and''' 15.'''

Ruby/C2/Ruby-Methods/English-timed - Revision history

PoojaMoolya at 06:36, 10 March 2017

Sandhya.np14 at 17:10, 18 November 2015

Sandhya.np14 at 17:26, 28 October 2015

Priyacst at 10:06, 13 November 2014

Pratik kamble at 09:39, 10 July 2014

PoojaMoolya at 10:42, 2 June 2014

Sneha at 10:16, 16 April 2013

Sneha: Created page with ' {| border=1 || ''Time''' || '''Narration''' |- | 00.01 | Welcome to the Spoken Tutorial on '''Ruby Methods'''. |- | 00.05 | In this tutorial we will learn |- | 00.07 | W…'